Toll roads are the epitome of capitalism and quite American. To have a public / private consortium step in to fund the billions of dollars in up-front costs associated with road building to serve routes where public funding is not available on its own is a great solution and there ABSOLUTELY has to be a profit reward as an ROI.
Optional toll roads that provide more direct or faster moving routes are a convenience for which I am willing to pay. Thinking someone should put up the funds in the absence of a generous profit is un-American. Those who don’t like toll roads can avoid them.